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Install in OpenClaw
/install vynn-backtester
Description
Run trading strategy backtests with natural language — powered by Vynn
Usage Guidance
This skill appears to do what it claims, but it will transmit your strategy descriptions and ticker lists to the-vynn.com. Before installing: (1) Accept that strategy text is sent to an external service — avoid sending proprietary or confidential strategies you don't want shared. (2) Review Vynn's privacy and terms (how long they retain inputs/results). (3) Use a dedicated API key or throwaway account if you want to limit exposure and rotate the key if compromised. (4) If you have a self-hosted Vynn instance, you can set VYNN_BASE_URL to keep data in your environment. (5) Review network egress policies if running in a sensitive environment.
Capability Analysis
Type: OpenClaw Skill
Name: vynn-backtester
Version: 1.0.0
The OpenClaw skill 'vynn-backtester' is a legitimate client for the Vynn backtesting service. It clearly documents its purpose, required environment variables (`VYNN_API_KEY`), and external network interactions with `https://the-vynn.com` for backtesting and signup. The `plugin.py` code correctly handles API key authentication and sends only strategy descriptions and ticker lists, without attempting to exfiltrate sensitive data or execute arbitrary commands locally. The `SKILL.md` contains no prompt injection attempts against the agent; all instructions and examples are for legitimate usage.
Capability Assessment
Purpose & Capability
Name/description (backtester) align with requested resources: it only requires VYNN_API_KEY and optionally VYNN_BASE_URL to call the Vynn API. No unrelated credentials, binaries, or config paths are requested.
Instruction Scope
SKILL.md and plugin.py explicitly send strategy text, tickers, and lookback parameters to the Vynn API (/v1/backtest). This is expected for a hosted backtest service, but users should be aware that strategy descriptions and ticker lists are transmitted to an external service (may be sensitive/intellectual property).
Install Mechanism
No install spec; this is an instruction/code-only skill. plugin.py uses only Python stdlib (urllib) and nothing is downloaded or written by an installer.
Credentials
Only VYNN_API_KEY is required (primary credential) and an optional VYNN_BASE_URL override. The requested env vars are proportional to the service being integrated; no unrelated secrets are requested.
Persistence & Privilege
Skill is not granted always:true and does not modify other skills or system-wide settings. It reads its own env vars and does not persist credentials to disk in the provided code.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install vynn-backtester - After installation, invoke the skill by name or use
/vynn-backtester - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
Initial release: Natural language trading backtests powered by Vynn
Metadata
Frequently Asked Questions
What is Vynn Backtester?
Run trading strategy backtests with natural language — powered by Vynn. It is an AI Agent Skill for Claude Code / OpenClaw, with 688 downloads so far.
How do I install Vynn Backtester?
Run "/install vynn-backtester" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Vynn Backtester free?
Yes, Vynn Backtester is completely free (open-source). You can download, install and use it at no cost.
Which platforms does Vynn Backtester support?
Vynn Backtester is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Vynn Backtester?
It is built and maintained by beee003 (@beee003); the current version is v1.0.0.
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